I see there is a connector in the picture that says "to headlamp socket" would that go into the original headlight socket? If so which side?

The black connector plugs into the female wiring socket that you removed from one of the headlights. The two yellow male terminals get plugged into the back of headlights. You will have to install the black connector into the headlight harness on the side nearest the battery. Mount the relays, battery feed and that side's ground strap in the same area. The long extension to the other headlight gets into the back of the headlight after you removed the terminal. Install that side's ground. That original female terminal that was on that headlight will no longer be used. Tape it up and secure out of the way.

Does this work with a 1986 Toyota pickup?

Yes it does I have it on my 88 4runner

Does this work on 2004 honda crv?

Probably don’t need it. This is for very old vehicles that Cannot regulate the amperage to the LEDs. If your LED lamps flicker when you install them, this should solve it though....... I think.

Will this relay kit work on a 1992 Dodge D-250 Diesel?

Sorry, the fitment said not fit your car.

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Partsam H4 9003 Headlight Relay Wiring Harness Kit Dual High Low Beam Headlamp w/High Heat Ceramic Plugs

Partsam H4 9003 Headlight Relay Wiring Harness Kit Dual High Low Beam Headlamp w/High Heat Ceramic Plugs

Product ID: 678727959

Details

Auto part position
Rear
Brand
Partsam
Fit type
Universal Fit
Included components
Cord Wiring
Light source type
Xenon

⚡Max 80A input current

🔌Pre-wired plug & play

🔥High heat ceramic plugs

Description

🚗 Light Up Your Drive with Confidence and Style!

DUAL BEAM CONTROL - Seamlessly switch between high and low beams for ultimate road safety.
PLUG PLAY SIMPLICITY - Pre-wired harness means zero wire splicing—upgrade your lighting in minutes.
BUILT TO WITHSTAND HEAT - High heat-resistant ceramic plugs prevent overheating and extend lifespan.
POWER UP WITHOUT COMPROMISE - Supports high wattage halogen bulbs to banish dim, flickering headlights.
SAFETY FIRST WITH FUSE RELAYS - Built-in fuse and dual 80A waterproof relays protect your vehicle’s electrical system.

The Partsam H4 9003 Headlight Relay Wiring Harness Kit is a robust upgrade designed for vehicles using H4/9003 headlights. Featuring dual high/low beam control, high heat-resistant ceramic plugs, and dual 80A waterproof relays with built-in fuse protection, it ensures safer, brighter lighting with easy plug-and-play installation. Ideal for Jeep Wrangler, Toyota Pickup, and more, it fixes common headlight issues like dimming, flickering, and overheating, extending the life of your original wiring harness.

Specifications

ASIN	B078XV8PL7
Auto Part Position	Rear
Automotive Fit Type	Universal Fit
Brand Name	Partsam
Customer Reviews	4.5 4.5 out of 5 stars (532)
Fit Type	Universal Fit
Included Components	Interconnection Cord, Wiring Harness
Item Weight	0.31 Kilograms
Light Source	Xenon
Manufacturer	Partsam
Manufacturer Part Number	GTCV-0440275598
Model Number	GTCV-0440275598
Number of Items	1
Number of Packs	1
Number of Pieces	1
Set Name	H4 Headlight Relay Harness Kit (2 Relays, 2 Ceramic Plugs, Wiring Harness)
Voltage	12 Volts

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